IIN my brother got hard when I sat on his lap?

The only way you are going to get past this is by having sex with your brother and having his big hard 20-year old cock penetrate your tight wet teenage pussy and thrust over and over again.

You need to do it and you need to do it fast. Just do it in the middle of the night, wake him up and get it over with in his bed. Then swear that you guys will never speak of it ever again, it will be your little secret forever.

Otherwise its going to be very awkward forever and you will have strange angry and awkward emotions around each other forever

So get it over with already.